Portable fuel burner assembly



July 2, 1968 o. H. KLINGBERQ 3,390,942

PORTABLE FUEL BURNER ASSEMBLY 5 Sheets-Sheet 1 Filed June 16, 1966 Fig.1

Ju y 2, 9 68 o. H. KLINGBERG 3,390,942

PORTABLE FUEL BURNER ASSEMBLY 5 Sheets-Sheet Filed June 16. 1966 J ly z,968 v o. H. KLINGBERG 3, 0,

PORTABLE FUEL BURNER ASSEMBLY Filed June 16, 1966 5 Sheets-Sheet; 5

Fig.3

12 nm nmunm 1 I 8 O United States Patent 2 Claims. (Cl. 431 114 ABSTRACTOF THE DISCLOSURE A portable fuel burner assembly removably mounted on aheater or furnace combustion chamber opening and removable as a whole orby subas-semblies thereof. The assembly comprises a base plate with aremovable subassembly of a first plate on the base plate with a fuelpump, an electric motor and a second plate defining with the base platea chamber in which a fan driven by the motor is disposed. The secondplate mounts a fuel nozzle and ignition electrodes for igniting fuelfrom the nozzle. Electrical controls and an ignition transformer aremounted on the base plate. A cover is provided over the assembly withapertures located to direct air flow over the various components alongpaths such that the components are kept cooled. A flame tube is mountedon the base plate and extends into the combustion chamber of the heateror furnace when the assembly is in use. The first plate is mountedresiliently to isolate vibrations of the fuel pump and fan. Thus theentire fuel burner assembly is readily removable and the subassernbly,the transformer and the electrical controls are removable independentlyor with the assembly on a whole.

In modern oil firing assemblies for fuel oil burners especially for usein heaters for cottages and the like it is generally a requirement thatwhen defects occur in the devices the parts therein ought to be rapidlyreplaced or alternatively that one can easily replace the wholeequipment or assembly with a spare equipment for avoiding servicing theassembly at the place in question, which nowadays is very expensive.Thus it is desirable to make the units included in an oil burner deviceeasily dismountable for the owner so that he himself is able to takeparts with him to a service station for adjustment or replacementwhereby the costs in such cases will be considerably lower. Also it isdesirable to arrange the unit within a small space which, on account ofthe heat generation, hitherto has been very diflicult. The presentinvention has for its object to solve these problems in a simple andsuitable manner.

A burner-assembly or arrangement according to the present invention isessentially characterized in that the oil burner as well as fan, oilpump and electrical control devices are arranged on a common base platefrom which the oil burner projects. The plate is adapted to be arrangedat for instance on the opening of a furnace door; all of the unitsmounted on the base plate being easily detachably mounted.

Preferably the fan, fan motor, pump and burner including ignitionelectrodes constitute a detachable unit and the ignition transformeranother detachable unit and the electrical control device a thirddetachable unit. Preferably the base plate is provided with a coverenclosing the units. The cover is such that the combustion air to thefan is sucked through perforations or the like in the cover so that theunits in question are effectively cooled thereby.

The present invention will be described in detail with reference to theaccompanying drawings in which FIG. 1

3,390,942 Patented July 2, 1968 shows an embodiment of the invention ina view towards the mounting side of the base plate with cover removed,FIG. 2 is a view in horizontal section and FIG; 3 is a section along thelines III-III in FIG. 1.

The arrangement shown on the drawings comprises a base plate 1 on whichare arranged a fan-burner unit 2, ignition transformer 3 and anelectrical control device 4. The fan and burner unit 2 consists of amotor 5, which drives a fan 6 which in turn is mounted in a drum 7 madein one piece with the base plate and which guides the air laterally intoa burner tube 8 thereby obtaining a rotating turbulence flow of air inthe tube. Within the burner tube 8 an oil fuel jet 9 is arranged whichis connected to a plate 10 at the end of the tube 8; an elongation ofsaid plate constituting one wall of the fan drum 7. The jet 9 is, bymeans of a conduit 11, connected with a fuel pump 12 which in turn isconnected to a container for oil fuel (not shown) by means of a conduit13. The pump 12 is driven by means of a toothed belt 14 by the fan motor5. The entire unit 2 now described is arranged on a plate 15, which bymeans of connecting screws 16 is detachably arranged on a bracket 17projecting from the base plate. Two ignition electrodes 18 are mountedon the plate 10 together with a photocell 19 both of which project intothe burner tube 8. The ignition electrodes 18 are, through detachablelines 20, connected to the ignition trans-former 3. From the ignitiontransformer 3 conduct-ors 21 are connected to the electrical controlunit 4. The photocell 19 is, via line 22, also connected to the controlunit as well as the fan motor by means of lines 23. When loosening theplate 15 by unscrewing the screws 16 the fan motor together with the fanand the fuel pump will be brought together with the plate 10 and partsconnected thereto. A-s appears in the drawings the units in thearrangement are very easily accessible and easily detachable from thebase plate 1 whereby inspection as well as service may be easily carriedout. Over said units a cover 24 is arranged which is provided with airinlet holes 25 which are arranged such that combustion air suctioned bythe fan 6 passes over the ignition transformer 3 and the electricalcontrol unit 4 as well as around the fuel pump and the back side of theburner tube 8 whereby effective cooling is obtained in this way of theunits situated inside the cover.

In addition the arrangement functions such that the electrical controldevice 4 controls the start of the fan motor and supply of electricalcurrent to the ignition electrtfilesgas well as control of thecombustion by the photoce 1 In order to minimize the pump fluctuationsof oil fuel 1nto the mouth piece 9 it may be preferable to insert afluctuation damping device in the supply line 11 between the jet 9 andthe fuel pump 12.

What is claimed is:

1. For use on a heater or furnace and the like having a combustionchamber, a portable fuel burner assembly mounted in use removable as awhole unit and comprising a base plate on which is mounted said fuelburner assembly, said fuel burner assembly comprising a subassernblydetachably mounted on said base plate On a common side of said baseplate removable jointly with said fuel burner assembly and independentlythereof, said subassernbly comprising a first subassernbly comprising afirst plate detachably mounted on said base plate, a fuel pump removablymounted on said first plate, a fan having an electric motor mounted onsaid first plate, a second plate attached to said first plate definingjointly with said base plate sidewalls of a chamber within which saidfan is disposed, a fuel nozzle and ignition electrodes for igniting fueldischarged from said fuel nozzle removably mounted on said second plateextending toward and away from another side of said base plate oppositeto said common side, electrical control means and an ignitiontransformer for said ignition electrodes mounted removably on said baseplate, a removable cover cooperating'with said base plate to enclosesaid fuel burner assembly having air inlet openings in communicationwith said chamber and in position to direct in cooperation with saidsubassembly the'fiow of air'along paths maintaining cool components ofthe subassembly and said transformer and control means, a flame tube onsaid base plate extending axially from said another side disposed incommunication with said chamber and circumferentially about said fuelnozzle and said ignition electrodes, said flame tube disposed extendingin operation into said combustion chamber when said assembly is in useon a heater, means mounting said first plate resiliently on said baseplate to isolate vibrations of said fuel pump and said fan, wherebytherentire fuel burner assembly is readily removable from said heaterfor complete replacement thereof and said subassem'bly, said transformerand said electrical means are removable independently without removal ofthe unit as a whole.

2. A portable fuel burner assembly according to claim 1, in which saidbase plate, said first plate and said second plate are disposed in asuspended condition substantially in parallel vertical planes in use,and said second plate is between said first and base plate spacedtherefrom, said chamber being disposed laterally relative to anextension of the longitudinal axis of said fiame tube on one side ofsaid extension of said axis, and said transformer and electrical controlmeans on an opposite side of said extension of said axis.

References Cited UNITED STATES PATENTS 2,262,525 ll/l94l De Lancey158-76 2,311,404 2/1943 Macchi 15876 3,252,497 5/1966 McGillis 15877JAMES W. WESTHAVER, Primary Examiner.

